Which of the following is a characteristic functional group of alcohols?

• A. Carboxyl group ($-COOH$)
• B. Carbonyl group ($C=O$)
• C. Hydroxyl group ($-OH$)
• D. Amino group ($-N{H}_2$)

Answer: (C)

Verified step by step guidance

1. Identify the functional groups listed in the problem: Carboxyl group (-COOH), Carbonyl group (C=O), Hydroxyl group (-OH), and Amino group (-NH2).
2. Understand the definition of a functional group: A functional group is a specific group of atoms within a molecule that is responsible for a characteristic chemical reaction of that molecule.
3. Recall the structure of alcohols: Alcohols are organic compounds where a hydroxyl group (-OH) is bonded to a carbon atom.
4. Match the functional group to the compound type: Alcohols are characterized by the presence of a hydroxyl group (-OH).
5. Conclude that the characteristic functional group of alcohols is the hydroxyl group (-OH).